High pressure air valve



`Mmfchl,1937.y WILLIAMSON' 2,074,245

l HIGH PRESSURE AIR VALVE Y `Filed June 16, 1956 OUTLET Patented "Mar, 1e, 1931 i y ,l"if,jfzbiausy i b b n n "il" l' i" 131GB RSSUBE-Allt varlvnh Y f William Williamson, pijama e.;

` Amiante' Junedaisae, serial 10.85309 solenne ,a 101.1277427),

n `My invention relates generally to high preseuren-valves;` and particularly to a high pressure airvalve," and an 'important object of the'inven- Widen isjto provide a practical and economical valvefof this characterfwhichfwill"easilyhandle' high air pressures.

l` l l Another `important object of niyl invention isf tofprovide a valve of the characterfindlcated @which 'has a double cut-oirl which takes effect y Owhenthevalve is worked inleither directionto its funiinuts of travel. ,y n t l v Anotherjimportant object of my invention"`i`s toprovide a valve* `oi?v` the character indicated whichbhasthose parts which `are subjected to1 t 5 wearreadily replaceable atlowl cost,` so as to l maintain the necessaryupkeep at the vlowest l pnssiblelevel. v l

` "Anotherfimportant object'of the invention isf` u to provide "in a valve of thefcharacter indicatedaf valve cage whiohincludes a strainerarrangel ment" whichis veryfeasily cleaned and whicli y strainer t v, ,t V. ,n v b t Anotherimportant object oi' my invention is f to `provide in a` valvewoftheI character indicated an arrangement wherein the pressure isbn" parts "dtherl than; theiuoperating stem, sothat the valve can'be readily opened and `closed despite being at work on extremely high pressures. "0 Other important objects of my invention will be apparent from a reading of the following de l scrlption in connection with the drawing, wheren in for purposes of illustration I have shown a `j preferred embodiment of my invention.

` eliminates the cost,fboi'A providing a` separate n In thedrawingpl Figure `1 is a general transverse vertical sectional view taken through the embodiment.

. 'taken through the combination valve cage and f fm strainer. t "Figure 31s a side elevational view of the pilot Stem` l i t v y l p t Referring in detail to the drawing, the body I:5er casing ofthe valve is generally designated by o t the numeral Bandincludes the elongated tubu- `lar portion 6 which has adjacent one end `the duced right hand threaded portion 8; The bore of this end of the tube 6 is provided with a left p hand thread as indicated by the numeral 9 to threadedly and rotatably receive the bodyl of the operating stem l|` which is provided on "its outer end with an operating wheel i2. The

`ac'tinga's adapter means. i l

shoulder 1 and axially 'outwardly of this a resmooth portionof the stem works through ahexagonal nut vl2 which` is threaded onthe re-n duced threadedportion i3.l Y-

The "threaded bore portion' terminates at thel5 at its axially outward end` and provided ini-` threads l1` teriorly with a'ared mouth I6 and ametric'ally opposite position ron the valve cas- *ing is aotherlateral branch i8 whichv issimilar `mounted therelnthe upper threaded portion 2l) of the valve cage which'fis' generally designated 2|` and shown individually in Figure f2. The

lowerend of the threaded bore portion i9 is provided with a flared seat`22 with Whichis adapted l toengage the iiared shoulder 23 below the threaded portion 2li` on the valve ca'ige. The upper end of thevalvefcageisprovided lnteriorlyl with Aa ilared` seat '24 with whichthe ilared por' PATENT `OFFICE n tion 25 on the head 26 ofthe pilot stmis adapted' to engage for valve closing purposes. l The pilot stem which is generally designated 21 includes the head 26 already mentioned and the `shank or stem 28 which has on its lower end the enlargement 29 in whose lower end is a concavity to cooperate with the surfaceof a Aball 30 which is movably disposed in' a smooth bore 3| whichextends from an intermediate point of the valve cage 2l and through its lower end.` A

b Vhelical spring 32 disposed inthe bore 3| below Figure 2 is a transverse' vertical sectional view the ballurges the ball in an upward direction b against the pilot` stem.

33 at its upper end which leads into a reduced smooth bore portion 34 which opens at its'v top in the Seat 24. l

Between the seat 23 of the valve cage and an intermediate portion of the valve cage body is a reduced portion 35 through the Walls of vwhich extend radial passages 36 which establish comy portion 28 of the pilot stem. The topof the head Y 26 of the pilot stem has a lug 3T traversed by an opening 38 which receives a pin 39 which is fastened in lugs depending from the bottom of the v 1o` Below thebraneh I4 and extending from a di-l valve stem body l whereby the pilot stem is swingably connected to the valve operating stem. As shown in Figure l, the valve cage when positioned in the valve casing has its threaded 5 portion 20 threaded in the threaded bore i9 and with the beveled seat 23 engaged with the casing seat 22, so that the holes 35 open at one side into the interior of the casing branch 25 and at other sides in an annular passage 39 which is formed inthe bore of the lower part of the casing. Below the openings 36 the smooth exterior of the valve cage nts the smooth bore portion l0 of the valve casing and projects therebelow, and this combined valve cage and strainer is confined in position by the nut 4I which is threaded on the threaded lower end di.'V of the casing. The lower projecting end portion of the valve cage is provided with transverse openings 43 enabling using a turning tool for extracting moval and replacement of the nut 4I and of,y

the valve cage itself by rotating the same into or out of 'position in the casing. Further, the pressure is on the ball 30 rather than on the stem of the valve and on the body of the cage and on the interior of the valve casing, `so that there is no appreciable strain of -pressure on the operating parts oi the valve, so that the valve may be easily operated eitherfoperi or closed by rotating the operating wheel l2. A wire mesh screen 36' is sweated around the portion 35.

Although I have shown and described herein a preferred embodiment of my invention, it is to be deiinitely understood that I do not desire to limit the application of the invention thereto, and any change or .changes may be made inthe 40 materials, and in the structure and'arrangement ofthe parts, within the spirit of the invention and the'scope of the subjoined claims.

What is claimed is:-

1. A high pressure valve of the character indi- 45 cated comprisingran elongated casing provided with a bore open atl both ends, one end portion of said bore being interiorly threaded and the opposite end being smooth, a threaded valve operating stem screwed in the interiorly threaded end port-ion of the bore and including a pilot stem, lateral branches on opposite sides of said casing and constituting an inlet and outlet respectively and communicating with said bore, the midportien of the bore lying between the inlet and the outlet being screw threaded, a removable longitudinal valve cage disposed in the smooth portion of said bore and having an externally screw threaded upper end engaged with the screw threaded mid portion ofthebore of the casing; said cage having a bore in which said pilot stem is disposed, a spring-pressed ball in the last-mentioned bore and engaged with said pilot, said cage having perforations in its side walls for establishing communication between the inlet of the casing and the bore of the cage, and tap means connected to the casing at the smooth bore end thereof and engaging over said valve cage for holding the spring-pressed ball in place.

2. A high pressure valve or" the character indicated comprising an elongated easing providedl with a bore, one end portion of said bore being in teriorly threaded for reception of a rotatable threaded valve operating stern, a threaded valve operating stem disposed therein and including a swingably connected pilot stem, lateral branches ori opposite sides of said casing and constituting an inlet and outlet respectively and communieating with portionsof said bore, a removable longitudinal valve cage disposed in another portion of said bore and having a part arranged between said branches so as to control communication of one of said branches with said bore and with the remaining branch, said cage having a bore in which said pilot stem is disposed, a spring-pressed ball in the last-mentioned bore and engaged with said pilot, said cage having perforations in its side walls communicating with one of said branches and with the bore of the cage, a portion of the bore of the casing adjacent one of said branches having a sealing seat, and the cage having a corresponding seat engaged therewith, and said pilot having a seat engageable with a seat in one end of the bore of the cage, thereby establishing a double seal and relieving the operating stem of pressure.

WILLIAM WILLIAMSON. 

